欧美成人刺激a片多人,巨臀精品无码AV在线播放,十八禁免费私人影院,老妇做爰XXXXHD老少配

Wall Sound Insulation Structure
Purpose and Construction

This product is suitable for sound insulation treatment of walls

With brick wall + sound insulation layer structure 1


The wall-mounted installation method is suitable for applications with high floor height (over 3.3 meters). With 200 aerated concrete block walls, the sound insulation can reach Rw=63dB.


160726-1(4).jpg

With brick wall + sound insulation layer structure 2

.

The floor and ceiling keel structure is installed away from the wall (not touching the brick wall).



Lightweight sound insulation wall construction without bricks


The light steel keel lightweight sound insulation wall structure is suitable for applications where the floor height is within 3.3 meters and there is no plan to build brick walls.




Related product recommendations